Talvez deva tentar algumas variações de ortografia:
renal impairment » visual impairment (Expandir a Pesquisa)
impairment thanh » impairment than (Expandir a Pesquisa), impairment thin (Expandir a Pesquisa), impairments than (Expandir a Pesquisa)
towel clamp » bowel clamp (Expandir a Pesquisa), towel clip (Expandir a Pesquisa), power clamp (Expandir a Pesquisa)
thanh ngoc » khanh ngoc (Expandir a Pesquisa), anh ngoc (Expandir a Pesquisa), thai ngoc (Expandir a Pesquisa)
capin can » capping can (Expandir a Pesquisa), pin can (Expandir a Pesquisa), capin a (Expandir a Pesquisa)
can ngoc » van ngoc (Expandir a Pesquisa), cao ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa)
j renal » j real (Expandir a Pesquisa), j renaldi (Expandir a Pesquisa), j renata (Expandir a Pesquisa)
j towel » _ towel (Expandir a Pesquisa), a towel (Expandir a Pesquisa), j towers (Expandir a Pesquisa)
clamp a » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
a now » a new (Expandir a Pesquisa), a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Performing a fuzzy search may retrieve terms with similar spellings: (( j renal impairment thanh ngoc ) or ((( j towel clamp a now ) or ( j nancy capin can ngoc ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j renal impairment thanh ngoc ) OR ((( j towel clamp a now ) OR ( j nancy capin can ngoc )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j renal impairment thanh ngoc ) or ((( j towel clamp a now ) or ( j nancy capin can ngoc ))))*.